66575263 has 2 divisors, whose sum is σ = 66575264. Its totient is φ = 66575262.

The previous prime is 66575237. The next prime is 66575273. The reversal of 66575263 is 36257566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66575263 - 2¹³ = 66567071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66575203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287631 + 33287632.

It is an arithmetic number, because the mean of its divisors is an integer number (33287632).

Almost surely, 2^66575263 is an apocalyptic number.

66575263 is a deficient number, since it is larger than the sum of its proper divisors (1).

66575263 is an equidigital number, since it uses as much as digits as its factorization.

66575263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 40.

The square root of 66575263 is about 8159.3665808076. The cubic root of 66575263 is about 405.2947364281.

The spelling of 66575263 in words is "sixty-six million, five hundred seventy-five thousand, two hundred sixty-three".